Fig. 4: Analysis of Ptriaz-CN-A binding interactions with metal ions.
From: Porous organic polycarbene nanotrap for efficient and selective gold stripping from electronic waste
a XPS profile of Ptriaz-CN-A before and after Au3+ adsorption. b–e High-resolution Au 4f XPS spectra after adsorption tests in 10, 100, 300 and 500 ppm Au3+. The coloured shadings represent the internal integral area of different characteristic peaks. Au0 (purple), Au1+ (orange) and Au3+ (red). f High-resolution C 1s XPS spectra before and after Au3+ adsorption. The coloured shadings represent the internal integral area of different characteristic peaks. C3 (purple), C6 (pink), s-triazine/amidine C (orange), C5 (red) and -CF3 (brown). g 1H-NMR spectra of Ptriaz-CN and Ptriaz-CN (metal ion) complex. h 13C-NMR spectra of Ptriaz-CN and Ptriaz-CN (Au). Source data are provided as a Source Data file.
